Rendering Sound In Video Sequencer
Good question Austin,

---the below answer is if you want to render a file which has audio embeded, not for if you are having trouble playing back an audio file in the Video Sequence Editor---

Once you have audio in the video sequence editor, you're halfway there.

So you need to change your render output settings in the render tab



Change it to a video format (I normally pick h264)



Then change the wrapper format to Quicktime MOV, and the codec to h264  or PNG if you need lossless quality.

Below that, change the audio codec from none to AAC or MP3 (they're the ones I have had most luck with)



And then hit render and it should be in the final render output file (a .mov)